Xiaomi Smart door lock pro can use rechargeable batteries. Fast charging and slow charging are relative concepts. Someone once asked, the charger charging current is 200mA, is it fast charge? This answer is not absolute, it should be answered that for some batteries, it is fast charge, and for some batteries, it is just slow charge. So how do we distinguish between fast charging and slow charging?
For example, one No. 5 nickel-metal hydride battery has a capacity of 1200mAH, while the other has a capacity of 1600mAH. The capacity of a battery is called 1C.